基于专家-层次分析法的岩溶地面塌陷易发性评价——以广西平桂区为例

Evaluation of vulnerability of karst collapse based on expert-analytic hierarchy process——a case study of Pinggui Distric,Guangxi

以地质灾害详细调查成果资料作为依据,利用专家-层次分析法对贺州市平桂区岩溶地面塌陷易发性进行评价,选取了11个影响岩溶塌陷易发性的地质环境因素,创建了贺州市平桂区岩溶地面塌陷易发性评价指标体系,再通过GIS的空间分析功能对平桂区岩溶塌陷易发性进行评价研究,将平桂区岩溶塌陷易发分区分为高、中、低、非岩溶区4种类型,其中岩溶塌陷高易发区(Ⅰ)的面积为87.18 km^(2);岩溶塌陷中易发区(Ⅱ)的面积为182.25 km^(2);岩溶塌陷低易发区(Ⅲ)的面积为348.97 km^(2);非岩溶区(Ⅳ)的面积为1403.6 km^(2)。评价结果对贺州市平桂区的岩溶塌陷地质灾害的防治具有指导意义。

Based on the detailed investigation results of geological hazards,the vulnerability of karst ground collapse in Pinggui District,Hezhou City was evaluated by expert-analytic hierarchy process (AHP).Eleven geological environmental factors affecting the vulnerability of karst ground collapse were selected,and the evaluation index system of karst ground collapse vulnerability in Pinggui District,Hezhou City was established.Based on the spatial analysis function of GIS,the vulnerability of karst collapse in Pinggui area is evaluated and studied.The karst collapse vulnerability zones in Pinggui area are divided into four types:high,medium,low and non-karst area.The area of high karst collapse vulnerability area (Ⅰ) is 87.18 km^(2).The area of prone area (Ⅱ) in karst collapse is 182.25 km^(2).The area of low-prone area (Ⅲ) of karst collapse is 348.97 km^(2).The area of non-karst area (Ⅳ) is 1403.6 km^(2).The evaluation results are of guiding significance to the prevention and control of karst collapse geological disasters in Pinggui District,Hezhou City.